Removable deep-weel-pump cylinder.



F. W. KROGH.

REMOVABLE DEEP WELL PUMP CYLINDER.

APPLICATION FILED OCT-10,1912.

Patented July 25, 1916.

2 SHEETS-SHEET 2.

' INVENTOR WITNESSES ATTO R N EY.

gmz aww by FERDINAND W. KROGH, 0F SAH FRANCISCO, CALIFORNIA.

REMOVABLE DEEP-WELL- PUMP CYLINDER.

Specification of Letters Patent.

Patented July 25, 1916.

Application fi1ed 0ctobcr 10, 1912. Serial 0. 724,946.

of that class, a pump cylinder in which the pump mechanism is contained,and means for holding and withdrawing the same from the well.

In carrying out my invention I provide a pump casing located inside thewell casing, and a pump cylinder located inside said pump casing, thebottom'of the pump cylinder resting on a support or seat fixed to thepump casing, and the top of the pump cylinder being steadied and held inposition by releasable dogs normally impinging the inner surface of thepump casing, whereby, when upward pressure is exerted against the dogs,as in the act of withdrawing the cylinder from the well, they arereleased from said engagement, and the whole cylinder and its contentscan be lifted from its support and brought to the surface of the ground.

My invention consists in the novel parts, combinations and arrangements,set forth in the following specification, particularly pointed out inthe claims, and illustratedin the accompanying two sheets of drawings,forming a part of this application, in which Figure 1 is a verticalcentral sectional View of a well and its casing, pump casing, pumpcylinder and contained mechanism. Fig. 2'is a cross sectional view takenalong the line aa Fig. 1, looking in the direction of the arrows.

The same symbol of reference marks the same part, in whichever view saidpart may appear.

Describing now my invention 1n deta1l, 1 is a well, in which is a wellcasing 2, and a pump casing 3.

Secured to the bottom of the pump casmg is a support or seat 4; A pumpcylinder 5 has secured at'its bottom a valve block 6 adapted to rest inseat a; and said block carries valve 7, located between the suction pipe8, secured to the valve block 6, and the chamber 9 above it. A piston 101s reciprocable inside the pump cylinder 5, and carries valve 11 withits mechanism, and arod' 12 operates the piston, and also lifts thecylinder to the'surface of the ground when required. At the top of thepump cylinder a block 13 is fixed forming a guide for rod 12; andlocated on said block are movabledogs I l, having pointed ends whichimpinge the pump casing 3, and steady the top of the pump cylinder andhold same in place. On rod 12 is fixed a piece 15 which acts as a stopfor spring 16 of valve 11, and also as a means for releasing the dogs.When rod 12 is lifted above the position shown in Fig. 1, piece 15engages the cars 17 of the dogs 14, and lifts them away from the casing8, in the position shown in dotted lines in Fig. 1, thereby allowing thepump cylinder to be withdrawn off itsseat on part 1 and with itscontents to be carried to the surface of the ground.

The valve 7 is held in position upon block 6 by means of a central pin18 secured to bridge 19 on the block 6, and at the upper part of saidpin is a nut 20 which serves as a flange to keep the spring 21 of thevalve 7 in compression.

The usefulness of my invention will be apparent if it is taken inconsideration that sometimes a pump has to be set several hundred feetbelow the surface of the ground,

and to remove the same for repair or otherwise is very costly and adiiiicult task; therefore the purpose of my invention is to reduce theexpense and facilitate the opera tion, which I accomplish by the meansabove described.-

Believing I have produced novel improvements in the class to which myinvention appertains, and having described it to enable those skilled inthe art to make and practise the same, what I claim and desire to secureby United States Letters Patent is:

1. In combination with the casing of a deep well pump, a pump cylinder,located therein provided with a block secured across the top thereof,dogs having pointed ends pivoted to said block adapted to impinge theinner surface of said casing and hold said cylinder in position therein.

2. In combination with the casing of a deep well pump, a pump cylinderlocated therein having a block secured across the top thereof, holdingdevice pivoted to said block adapted to engage said casing and hold.said cylinder in position therein, and means to release said holdingdevice.

3. In combination with the .casing of a deep Well pump, a pump cylinderprovided With a block secured across the top thereof, dogs pivoted tosaid block having pointed ends adapted to engage said pump casing andhold said pump cylinder in position therein, ears on said dogs and apump rod having means engaging said ears for releasing said dogs andthereby permitting the Withdrawal of said cylinder.

4. In. a device of the character described, comprising a Well casing, apump casing in said Well casing, a seat located at the bottom of saidpump casing, a valve block adapted to rest on said seat, a pump cylinderfixed to said valve block, a block having threaded means engagingdiametrically the top of said pump cylinder, dogs having pointed endspivoted to the sides of said threaded block engaging said pump casingand a pump rod pro ecting centrally through said Copies of this patentmay be obtained for five cents each, by addressing the Commissioner ofPatents, Washington, D. G.

